According to one embodiment, an electronic apparatus includes power transmission circuitry, and detection circuitry. The power transmission circuitry transmits power by an electromagnetic wave with a first frequency band. The detection circuitry receives a reception signal and performs carrier sense with a second frequency band different from the first frequency band. The detection circuitry includes interference avoidance circuitry that eliminates a signal having a third frequency band which is a part of the second frequency band from the reception signal.
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1. An electronic apparatus comprising: power transmission circuitry configured to transmit power by an electromagnetic wave with a first frequency band; and detection circuitry configured to receive a reception signal and to perform carrier sense with a second frequency band different from the first frequency band, wherein: the detection circuitry comprises interference avoidance circuitry configured to eliminate a signal having a third frequency band which is a part of the second frequency band from the reception signal, a frequency band, of the second frequency band, other than the third frequency band is used for wireless communication of another system, and the third frequency band provides wireless power supply.
This invention relates to wireless power transmission and communication systems, addressing interference issues between power transmission and concurrent wireless communication. The apparatus includes power transmission circuitry that transmits power via electromagnetic waves in a first frequency band. Simultaneously, detection circuitry operates in a second frequency band, distinct from the first, to perform carrier sense for wireless communication. To prevent interference, the detection circuitry includes interference avoidance circuitry that filters out signals in a third frequency band—a subset of the second frequency band—where the third band is reserved for wireless power supply. The remaining portion of the second frequency band, excluding the third band, is used for communication by another system. This design ensures that wireless power transmission does not disrupt concurrent wireless communication in adjacent frequency bands, enabling coexistence of power and data transmission in shared environments. The system dynamically avoids interference by selectively filtering power-related signals while allowing communication signals to pass, improving efficiency and reliability in multi-system wireless deployments.
2. The electronic apparatus of claim 1 , wherein the interference avoidance circuitry comprises filter circuitry in which the frequency band, of the second frequency band, other than the third frequency band is set as a passband.
This invention relates to electronic apparatuses designed to mitigate interference between wireless communication systems operating in overlapping or adjacent frequency bands. The problem addressed is the potential for signal degradation or communication failures when multiple wireless systems share or operate near the same frequency spectrum, particularly in scenarios where one system's transmissions interfere with another's reception or transmission. The electronic apparatus includes interference avoidance circuitry that selectively filters signals to reduce interference. Specifically, the circuitry comprises filter circuitry configured to pass a particular frequency band while attenuating others. The filter is designed to allow a second frequency band to pass through, except for a third frequency band within it, which is blocked. This selective filtering ensures that only the desired frequency components are transmitted or received, minimizing interference with other wireless systems operating in nearby or overlapping bands. The apparatus may be used in devices such as smartphones, routers, or other communication equipment where multiple wireless standards (e.g., Wi-Fi, cellular, Bluetooth) coexist and must operate without mutual disruption. The filter circuitry can be implemented using analog or digital filtering techniques, depending on the application requirements. The overall system enhances wireless communication reliability by dynamically managing frequency band usage to avoid conflicts.
3. The electronic apparatus of claim 1 , wherein the detection circuitry is configured to perform the carrier sense separately by dividing the second frequency band into a plurality of frequency bands, and to perform interference avoidance for a frequency band in which a difference in frequency from the first frequency band is smallest among the plurality of frequency bands.
This invention relates to electronic apparatuses designed to mitigate interference in wireless communication systems operating across multiple frequency bands. The problem addressed is the potential for interference between signals transmitted in different frequency bands, particularly when a secondary frequency band is used for communication while a primary frequency band is already in use. The apparatus includes detection circuitry that performs carrier sensing to identify active transmissions in the primary frequency band. To avoid interference, the detection circuitry divides the secondary frequency band into multiple sub-bands and prioritizes interference avoidance for the sub-band closest in frequency to the primary band. This ensures that the most critical frequency overlap is managed first, reducing the risk of signal degradation or communication failures. The apparatus may also include a communication circuit that adjusts transmission parameters based on the detection results, such as switching to a different sub-band or modifying power levels. The overall system enhances coexistence between wireless devices operating in adjacent frequency bands, improving reliability and efficiency in shared spectrum environments.
4. The electronic apparatus of claim 1 , wherein: when no signal greater than a predetermined value is detected during a carrier sense performed by the detection circuitry in a first period, the power transmission circuitry transmits power in a second period after the first period; and when a signal greater than the predetermined value is detected during the carrier sense performed by the detection circuitry in the first period, the detection circuitry performs another carrier sense in a third period after the first period.
This invention relates to wireless power transmission systems, specifically addressing interference detection and power transmission control. The system includes detection circuitry that performs carrier sensing to identify signals in the environment that may interfere with wireless power transmission. The detection circuitry compares detected signals against a predetermined threshold value to determine whether interference is present. If no signal exceeding the threshold is detected during a first sensing period, the power transmission circuitry proceeds to transmit power in a subsequent second period. However, if a signal exceeding the threshold is detected during the first period, the detection circuitry conducts another carrier sense operation in a third period following the first period. This adaptive approach ensures that power transmission only occurs when the wireless channel is clear, minimizing interference with other devices while optimizing power delivery efficiency. The system dynamically adjusts its operation based on real-time signal conditions, improving reliability in shared wireless environments.
5. The electronic apparatus of claim 4 , wherein a sum of a length of the third period and a length of the first period comprises a length of a period in which the carrier sense should be performed.
The invention relates to electronic apparatuses designed for wireless communication, specifically addressing the challenge of efficiently performing carrier sense operations to detect signal activity on a communication channel. Carrier sense is a critical function in wireless networks to avoid collisions and ensure proper data transmission. The apparatus includes a control unit that manages multiple time periods for carrier sense operations. The apparatus operates by defining a first period during which carrier sense is performed to detect signal activity. A second period follows, during which the apparatus refrains from performing carrier sense to conserve power or reduce processing overhead. A third period then occurs, during which carrier sense is performed again to confirm or update the detection of signal activity. The sum of the lengths of the third period and the first period determines the total duration required for carrier sense operations. This approach optimizes the balance between signal detection accuracy and energy efficiency by structuring the carrier sense process into distinct, sequential periods. The apparatus may also include a communication unit for transmitting and receiving signals, and a power supply unit to manage energy consumption during these operations. The invention is particularly useful in wireless communication devices where power efficiency and reliable signal detection are critical, such as in IoT devices or sensor networks.
6. An electronic apparatus comprising: power transmission circuitry configured to transmit power by an electromagnetic wave with a first frequency band; and detection circuitry configured to receive a reception signal and to perform carrier sense with a second frequency band different from the first frequency band, wherein: the detection circuitry comprises interference avoidance circuitry configured to eliminate a signal having a third frequency band which is a part of the second frequency band from the reception signal, and the detection circuitry is configured to perform the carrier sense separately by dividing the second frequency band into a plurality of frequency bands, and to perform interference avoidance for a frequency band in which a difference in frequency from the first frequency band is smallest among the plurality of frequency bands.
This invention relates to wireless power transmission systems and addresses interference issues between power transmission and communication signals. The apparatus includes power transmission circuitry that transmits power via electromagnetic waves in a first frequency band and detection circuitry that receives signals and performs carrier sense in a second frequency band, distinct from the first. The detection circuitry includes interference avoidance circuitry that filters out signals in a third frequency band, which is a subset of the second frequency band, to mitigate interference. The detection circuitry divides the second frequency band into multiple sub-bands for carrier sense and prioritizes interference avoidance in the sub-band closest in frequency to the first frequency band. This approach ensures reliable communication by minimizing interference from the power transmission signal while efficiently utilizing the available frequency spectrum. The system dynamically adapts to frequency differences between power transmission and communication bands, enhancing overall performance in wireless power and data transmission applications.
7. An electronic apparatus comprising: power transmission circuitry configured to transmit power by an electromagnetic wave with a first frequency band; and detection circuitry configured to receive a reception signal and to perform carrier sense with a second frequency band different from the first frequency band, wherein: the detection circuitry comprises interference avoidance circuitry configured to eliminate a signal having a third frequency band which is a part of the second frequency band from the reception signal, when no signal greater than a predetermined value is detected during a carrier sense performed by the detection circuitry in a first period, the power transmission circuitry transmits power in a second period after the first period, when a signal greater than the predetermined value is detected during a carrier sense performed by the detection circuitry in a third period, the detection circuitry transmits power in the second period after the third period, and the third period is longer than the first period, and a difference between the first period and the third period is a period in which the signal is greater than the predetermined value.
This invention relates to wireless power transmission systems and addresses interference issues during power transmission. The apparatus includes power transmission circuitry that transmits power using an electromagnetic wave in a first frequency band. It also includes detection circuitry that receives a reception signal and performs carrier sense in a second frequency band, which differs from the first frequency band. The detection circuitry includes interference avoidance circuitry that eliminates signals within a third frequency band, which is a subset of the second frequency band, from the reception signal. The system operates in two modes based on carrier sense results. If no signal exceeding a predetermined threshold is detected during a carrier sense in a first period, the power transmission circuitry transmits power in a subsequent second period. If a signal exceeding the threshold is detected during a carrier sense in a third period, the detection circuitry delays power transmission until a second period following the third period. The third period is longer than the first period, and the difference between the first and third periods corresponds to the duration of the detected signal exceeding the threshold. This approach ensures reliable power transmission while minimizing interference from other signals in the second frequency band.
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September 9, 2020
March 15, 2022
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